air compressor built-in  surface DTH mine drilling rig for quarry                                                                                     ModelHW421Machine Weight6800kgEngineYuchai  162 kWDrill Pipe Sizes60 X 3,000 mmHole Dia80-115 mmWorking Pressure15 barF.A.D12 m3/minTramming Speed ( Max.)3 km/h (High Speed)Gradient25°Track Frame Oscilation±10°Transportation Dimensions6000X2800X2750 mm